Answer: 8! = 40320.
- A 8! = 40320
- B 8!/(4!)
- C 8P4
- D 4! × 4!
Correct answer: A. 8! = 40320
Explanation: All 8 in 2 rows of 4 is still 8! since specific positions matter. But if rows are 4 fixed positions each: 8P8 = 8! = 40320.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections